Preprocessing of speech signal using Audacity

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buttermuffin
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Joined: Sun Nov 15, 2020 11:56 am
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Preprocessing of speech signal using Audacity

Post by buttermuffin » Sun Nov 15, 2020 12:04 pm

Hi, I'm just started to develop a speech recognition system. I already collected the audio to be processed. Originally the speech signal is in analog. My concern here is can Audacity convert analog speech signal to digital speech signal? So that it can be preprocess. If can, how? Thank you!
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steve
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Re: Preprocessing of speech signal using Audacity

Post by steve » Sun Nov 15, 2020 1:07 pm

buttermuffin wrote: ↑
Sun Nov 15, 2020 12:04 pm
 I already collected the audio to be processed
How have you done that? Do you have the collection on your computer?
buttermuffin wrote: ↑
Sun Nov 15, 2020 12:04 pm
 I'm just started to develop a speech recognition system
What is your level of experience as a software developer?
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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buttermuffin
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Joined: Sun Nov 15, 2020 11:56 am
Operating System: Windows 10

Re: Preprocessing of speech signal using Audacity

Post by buttermuffin » Sun Nov 15, 2020 1:20 pm

Yes, I have the audio data in .wav format in my laptop and I'm a student actually, currently doing a research in Speech Recognition System.
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steve
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Re: Preprocessing of speech signal using Audacity

Post by steve » Sun Nov 15, 2020 1:40 pm

buttermuffin wrote: ↑
Sun Nov 15, 2020 1:20 pm
 I have the audio data in .wav format
As you can read on Wikipedia (https://en.wikipedia.org/wiki/WAV) WAV files are digital.
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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Trebor
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Re: Preprocessing of speech signal using Audacity

Post by Trebor » Sun Nov 15, 2020 2:50 pm

Windows has speech-recognition built-in ...
https://wikipedia.org/wiki/Windows_Speech_Recognition
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buttermuffin
Posts: 5
Joined: Sun Nov 15, 2020 11:56 am
Operating System: Windows 10

Re: Preprocessing of speech signal using Audacity

Post by buttermuffin » Sun Nov 15, 2020 3:01 pm

Thank you so much Steve and Trebor.

Oh I see. So I can skip the A/D Conversion process right? I can went straight away to the next process of preprocessing speech signal which is noise removal then pre-emphasis and lastly framing and windowing?

Or is it framing and windowing considered as a same step? And can I accomplish this tasks with Audacity?

Thank you.
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